Many major coastal cities are experiencing local land subsidence where underground soil and rock collapse, causing the surface above to sink.
From someone born in the 19th century, in the midst of historic population growth, comes this vintage visualization showing world cities growing ever bigger.
Where are the world’s largest cities in terms of population? This graphic looks at the top 20 most populous cities in the world.
How has the list of the most populous U.S. cities changed over time? This infographic shows the top 10 cities of every decade since the year...